Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition
The control modules communicate with each other for exchange of information in a network via a standardized serial communication procedure - CAN (Controller Area Network).
The diagnostic trouble code (DTC) is stored if the control module detects that:
- Communication with Driver information module (DIM) is interfered with or is lost.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Ignition on.

Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met. The diagnostic trouble code (DTC) indicates a fault in the communication across the CAN network and does not isolate an individual node. Avoid replacing a control module, as long as fault tracing does not indicate that it is damaged.

Substitute value
- None.

Possible source
- No power supply to the driver information module (DIM).
- Open-circuit in the ground lead to the driver information module (DIM).
- Open-circuit or short-circuit in the wiring for the control area network (CAN).
- Contact resistance, oxidation or poor contact in connections.
- Driver information module (DIM) is not intended for this vehicle (for example a used control module with different software/hardware).
- The Passenger door module (PDM) is not designed for this vehicle, e.g., a used control module with other software.

Hint: If several diagnostic trouble codes (DTCs) are generated in the central electronic module (CEM) for communication errors with other control modules in intermediate speed network, this indicates a common fault in the Control area network. See wiring diagram for vehicle model in question.

Fault symptom[s]
- None.